Downloaded and played, and yeah not bad for the price. Love the damage modelling. But ah... btw, the Iowas had only
nine 16" guns.
Any way though, you've obviously put a lot of effort into this and with some more tweeking could be quite good.
Working fine on 4th gen Ipod touch with ios 5.1.1.
Some suggestions:
Would be good to have incremental upgrades rather than just on/off.
Are you looking to later reintroduce depth charging with random damage/survival? I rather like the 'search' aspect as is.
Multiple player units?
Enemy units to the far left or right of the field 'dissappear' if they move too close, preventing the player from targeting them.